User Manual of EM730/EM730E Series Inverter
311
Table 4-27 Content of Regular Inspection
In order to make the inverter work properly in a long time, regular maintenance and
replacement must be performed regularly based on the service life of its internal components.
The service life of the components of the inverter varies depending on the operating
environment and conditions. The replacement period of the inverter in Table 4-28 is for
reference only.
Table 4-28 Replacement Intervals of Inverter Components
Name of Part
Standard Replacement Interval (Year)
Cooling fan
2-3 years
Electrolytic capacitor
4-5 years
Printed circuit board
5-8 years
The operating conditions for replacement of the inverter components listed in the above
table are as follows:
Ambient temperature: Annual average 30
℃
.
Load factor: Less than 80%.
Operating time: less than 12 hours per day.
9.4
Instructions for Inverter Warranty
Our company will provide warranty services for the inverter in the following cases.
Check Item
Check Content
Solution
Screws of main
circuit terminals
and control circuit
terminals
Check whether the screws are
loose.
Tighten
the
screws
with
a
screwdriver.
Cooling fins
Check whether there is dust or
foreign objects.
Purge them with dry compressed
air (pressure: 4-6 kg/cm
2
).
PCB (printed circuit
board)
Cooling fan
Check it for abnormal noise and
vibration. Check whether the
cumulative running time is up to
20,000 hours.
Replace the cooling fan
Power components Check whether there is dust.
Purge them with dry compressed
air (pressure: 4-6 kg/cm
2
).
Electrolytic
capacitor
Check it for color changes, odor
and bubbles.
Replace the electrolytic capacitor.
